EXPLAIN has output with MATCHCOLS = 0. What does it mean?5
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Q: EXPLAIN has output with MATCHCOLS = 0. What does it mean?
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Answer :
Explanation :
a nonmatching index scan if ACCESSTYPE = 1
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Since Nithya and Suganya exchange places, so Rita’s new position is the same as Monika’s earlier position. This position is 17th from the right and 10th from the left. Therefore Number of girls in the row = (16 + 1 + 9) = 26.